Specifically, lignin is a highly polymerized, amorphous material that makes up the middlelamella of woody fibers and cements the fibers together.
木质素是一种高度聚合的无定形材料，组成木质纤维的胞间薄层将纤维连接起来。
2
In both woods, chlorine reacted very rapidly with lignin but the extent of reaction was greater in the secondary wall than in the cell corner middlelamella.